Published September 1, 2002 | Version v1
Journal article Metadata-only

Study of the structure of baryons from J/ψ→BB-bar decays in the quark model

Creators

  • 1. Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080 (China)
  • 2. CCAST (World Laboratory), P.O. Box 8730, Beijing 100080 (China)
  • 3. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039 (China)
  • 4. Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000 (China)

Description

From J/ψ→pp-bar, ΛΛ-bar, Σ0Σ-bar0, and Ξ+Ξ- decays we study the structure of baryons including nucleons, Λ, Σ, and Ξ in the naive quark model. Considering the lowest-order quark diagrams for baryon-antibaryon pair production from J/ψ decays we calculate the baryon-antibaryon angular distributions. Using the experimental data for the angular distribution for the process J/ψ→pp-bar produced in e+-e- collisions, we determine the range of parameters for the quark mass mq and the harmonic-oscillator parameter β in the quark model. With these parameters, we calculate the branching fractions and angular distributions for the above J/ψ decay processes and find that the calculated values are comparable with the measured ones

Additional details

Identifiers

DOI
10.1103/PhysRevD.66.054020;

Publishing Information

Journal Title
Physical Review. D, Particles Fields
Journal Volume
66
Journal Issue
5
Journal Page Range
p. 054020-054020.7
ISSN
0556-2821
CODEN
PRVDAQ

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
35067711
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
ANGULAR DISTRIBUTION; ANTIBARYONS; ANTINUCLEONS; ELECTRON-POSITRON INTERACTIONS; HADRONIC PARTICLE DECAY; J PSI-3097 MESONS; LAMBDA BARYONS; PAIR PRODUCTION; PROTONS; QUARK MODEL; QUARKS; SIGMA BARYONS; XI MINUS PARTICLES
Descriptors DEC
ANTIBARYONS; ANTIMATTER; ANTIPARTICLES; BARYONS; BOSONS; CHARMONIUM; COMPOSITE MODELS; DECAY; DISTRIBUTION; ELEMENTARY PARTICLES; FERMIONS; HADRONS; HYPERONS; INTERACTIONS; LEPTON-LEPTON INTERACTIONS; MATHEMATICAL MODELS; MATTER; MESONS; NUCLEONS; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PRODUCTION; QUARKONIUM; STRANGE PARTICLES; VECTOR MESONS; XI BARYONS; XI PARTICLES

Optional Information

Notes
(c) 2002 The American Physical Society